221212210259 has 2 divisors, whose sum is σ = 221212210260. Its totient is φ = 221212210258.

The previous prime is 221212210213. The next prime is 221212210291. The reversal of 221212210259 is 952012212122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221212210259 - 2¹⁶ = 221212144723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (221212210159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606105129 + 110606105130.

It is an arithmetic number, because the mean of its divisors is an integer number (110606105130).

Almost surely, 2^221212210259 is an apocalyptic number.

221212210259 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212210259 is an equidigital number, since it uses as much as digits as its factorization.

221212210259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 221212210259 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, two hundred fifty-nine".